18811144285 has 8 divisors (see below), whose sum is σ = 23183464536. Its totient is φ = 14642187840.

The previous prime is 18811144267. The next prime is 18811144291. The reversal of 18811144285 is 58244111881.

It can be written as a sum of positive squares in 4 ways, for example, as 10424614201 + 8386530084 = 102101^2 + 91578^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18811144285 - 2¹¹ = 18811142237 is a prime.

It is a super-2 number, since 2×18811144285² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50840746 + ... + 50841115.

It is an arithmetic number, because the mean of its divisors is an integer number (2897933067).

Almost surely, 2^18811144285 is an apocalyptic number.

It is an amenable number.

18811144285 is a deficient number, since it is larger than the sum of its proper divisors (4372320251).

18811144285 is a wasteful number, since it uses less digits than its factorization.

18811144285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101681903.

The product of its digits is 81920, while the sum is 43.

The spelling of 18811144285 in words is "eighteen billion, eight hundred eleven million, one hundred forty-four thousand, two hundred eighty-five".